From Site Evaluation to System Design

A reliable recommendation begins before equipment is selected. Puroxi organizes site information into a repeatable pathway so the water problem, operating conditions and treatment objective remain connected throughout design and commissioning.

Learning objectives

Identify the minimum information required for a preliminary review.
Calculate water volume and required turnover.
Understand the pump duty point and total dynamic head.
Translate geometry and obstructions into equipment placement.
Create an installation and monitoring pathway that can be verified.

Step 1 — Define the objective

Describe the current condition and the measurable result required. Examples include dissolved-oxygen improvement, algae management, oxidation, odour reduction, water reuse, equipment protection or process support. Record applicable regulatory or biological constraints.

Step 2 — Document the water and site

Complete the Puroxi Site Evaluation with GPS location, dimensions, depth, volume, photographs, power, voltage/frequency, cable distance, chemistry, existing equipment, pump information, algae type, fish or aquatic life, turnover and seasonal temperatures.

Step 3 — Calculate volume, flow and turnover

Use the Water Calculators to obtain preliminary volume and turnover flow. Confirm whether the geometry is rectangular, circular, irregular or variable-depth. Calculator results should be retained with the assumptions used; they are not final equipment selections.

Step 4 — Build the pump duty point

For a nano-bubble loop, total required flow equals the operating nozzle quantity multiplied by the flow per nozzle. Convert nozzle operating pressure to pressure head, then add static elevation, pipe friction, fittings, valves, filters, other restrictions and a reasonable design allowance. Select a pump whose curve meets the resulting flow and head without excessive oversizing.

Submersible pumps are often useful for outdoor and hot-climate water applications. Install them securely, screened as required and approximately 30 cm above the bottom where site conditions permit. Use compatible materials, including suitable marine-grade components for seawater.

Step 5 — Place independent systems correctly

Ultrasonic algae control and nano-bubble treatment can support the same water objective, but their installations remain independent. The Quattro DB 360 is suspended from its float, electrically connected to shore power or an approved solar platform and secured by rope or chain to a concrete anchor. The nano loop separately uses a submersible pump feeding one Puroxi MNB nozzle, with treated water discharged back to the water body.

Comparison of gas and liquid delivery systems with pipelines, pumps, valves, and flow controls.

Step 6 — Define gas or liquid delivery

Select ambient air, oxygen, ozone, carbon dioxide, nitrogen or another suitable gas for the nozzle ports. Where hydrogen peroxide is selected, dose the liquid upstream with a controlled metering or peristaltic pump. Confirm materials, flowmeters, regulators, tubing, check valves and safety controls for the selected medium.

Step 7 — Commission and establish a baseline

Record water conditions before startup.
Verify voltage, flow, pressure, gas delivery and operating sequence.
Inspect placement, leaks, vibration, intake and discharge.
Take repeat photographs from fixed locations.
Set cleaning and maintenance intervals.
Define who collects data, how often and with which calibrated instruments.
Compare results with baseline under reasonably comparable conditions.

Knowledge check

What information is needed before calculating equipment quantity?
What makes up total dynamic head?
Are ultrasonic and nano-bubble systems physically connected?
Where is liquid hydrogen peroxide dosed?
Why must calculator assumptions be retained?

ANSWERS

1) Objective, water/site data, geometry, chemistry and constraints.
2) Pressure head, static elevation, friction, fittings/equipment and allowance.
3) No; they remain independent.
4) Upstream through controlled liquid dosing.
5) So preliminary results can be reviewed and verified before final selection.

PUROXI PRINCIPLE

Understanding Always Comes Before Recommendation.